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I forgot to add few things..........
application will run in background and user should not see it or terminate
the application ...............i will implement system security but as a
restricted user on Window 2000 user should not be able to use taskmgr to end
task particular application.

Thanks for Info................i restircted unwanted sites.
But what i see is in windows2000 ,even restricted user can edit host file
and delete entries.
Is thr any option that user can not delete entries from hosts.

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